Ground Zero GZHW 25XSPL-D2 (2x2 Ohm)

10″ subwoofer · dual 2 Ω · 1,200 W RMS

Fs 41.8 HzQts 0.49Vas 0.30 ft³Xmax 1.77″

Recommended box

For a sedan, one sub, 1,200 W. It’s the same math as the designer’s step-by-step mode, where you can fit the box to your space, vehicle and amp and get plans, a cut sheet and DXF.

Sealed

Net volume0.49 ft³ (14 L)
Qtc0.62
Fc53 Hz
F3 (−3 dB, no cabin gain)64 Hz
Example box (outside)12 5/8″ × 12 5/8″ × 9 1/8″
Open sealed box in designer

Ported

Net volume1.02 ft³ (29 L)
Tuning (Fb)30 Hz
Portround port Ø3″, 18 3/16″ long
Port velocity at 1,200 W280 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)24 1/2″ × 15 3/4″ × 7 11/16″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs41.8 Hz
Qts0.49
Qes0.53
Qms6
Vas0.30 ft³
Re (one coil)≈ 1.7 Ω
Sd≈ 52.7 in²
Xmax1.77″
EBP79 — sealed or ported calc.
Sensitivity, 1 W / 1 m82.7 dB calc.

General

Size10″
Voice coilsdual 2 Ω
RMS power1,200 W

Mounting dimensions

Ø≈ 10 9/16″cutout Ø9 3/8″mounting depth ≈ 5 1/8″magnet Ø≈ 6 1/16″
Cutout diameter9 3/8″
Mounting depth≈ 5 1/8″

Only Qts is published — Qms assumed to be 6 and Qes calculated (barely affects box design).

“≈” means the value isn’t in the spec sheet and a typical value for the size is used; “calc.” means it’s calculated from the published parameters. Check the manufacturer’s spec sheet before you build.

Data sources

Other Ground Zero 10″ models